Went from 81 day cycle to a 22 day one??

Starr

So my periods cycles are typically around 33-40 days long however last month I had an 81 day cycle (I am sexually actively but wasn’t pregnant) and now I just started my period again making this a 22 day cycle. I’m so confused what is going on because 22 days is almost HALF of what im used to, I never get periods this close together and especially not right after an 81 day cycle that is DOUBLE my normal cycle. What the hell??